Celebrating its 10th anniversary, Musta lammas is an expressive choir consisting of twenty-four professional musicians. The group’s singers are united by the desire to bring high-quality rhythmic music to the Finnish a cappella field. The group is defined by a tight sense of groove and distinctive arrangements and compositions made by the members. Musta lammas has been an invited performer at major vocal festivals in for example New York and Aarhus. In 2025, the choir was a featured artist at Leading Voices Festival in Tallinn and Lund Choral Festival.

 The choir comes from Helsinki, Finland, and was founded in early spring 2016. All of Musta lammas music is custom written for the group and varies from original songs to tasty re-arrangements. Musta lammas is Finnish for “black sheep”, pointing at their position as groundbreakers within the Finnish choir scene. The choir combines a passion for rhythmic music with high-leveled musicianship. Musta lammas was founded and is led by Ida Olsonen.